US2448089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torch cutting machine
Assignee: Airco Inc
•
Filing: 1943-12-27
•
Granted: 1948-08-31
•
Expires: 1963-12-27
Abstract
No abstract record available.
Inventors
- 👤 Duvall Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:06
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/002; B23K7/003; Y; Y10; Y10S; Y10S266/00; Y10S266/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1176584A
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US1260316A
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US1687001A
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US1858078A
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US1885107A
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US2054847A
Cited
US2233669A
Cited
US2283345A
Cited
US2339567A
Cited
GB546009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |